| General Information about Area Code 423 | |
|---|---|
| Country | United States |
| State / Province / Territory | Tennessee |
| Major City | Chattanooga |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 423-327 | Bulls Gap | Hawkins | Wireless |
| 423-253 | Tellico Plains | Monroe | Landline |
| 423-862 | - | - | - |
| 423-762 | Chattanooga | Hamilton | Wireless |
| 423-458 | Cleveland | Bradley | Wireless |
| 423-200 | Morristown | Hamblen | Landline |
| 423-975 | Johnson City | Washington | Landline |
| 423-638 | Greeneville | Greene | Landline |
| 423-213 | Johnson City | Washington | Wireless |
| 423-313 | Chattanooga | Hamilton | Wireless |
| 423-653 | Chattanooga | Hamilton | Wireless |
| 423-965 | Deer Lodge | Morgan | Landline |
| 423-874 | Chattanooga | Hamilton | Landline |
| 423-389 | Johnson City | Washington | Wireless |
| 423-793 | Blountville | Sullivan | Landline |
| 423-339 | Cleveland | Bradley | Landline |
| 423-824 | Unicoi | Unicoi | - |
| 423-263 | Etowah | Mcminn | Landline |
| 423-562 | Duff | Campbell | Landline |
| 423-926 | Johnson City | Washington | Landline |